Royal Enfield METEOR MINOR STANDARD 1958 Workshop Maintenance Manual page 51

6. Hub Bearings
These are deep-groove single-row journal
5
ball bearings, / in. i/d by 1.
8
wide. The Skefko Part No. is RLS5. Equivalent
bearings of other makes are Hoffmann LS7,
Ransome and Marles LJ
7. Fitting Limits for Bearings
The fit of the bearings in the hub barrel is
important. The bearings are locked on the
spindle between shoulders and the distance
pieces, which in turn are held up by the nuts on
the spindle. In order to prevent endways pre-
loading of the bearings it is essential that there is
a small clearance between the inner edge of the
outer race of the bearing and the back of the
recess in either end of the barrel. To prevent any
possibility of sideways movement of the hub
barrel on the bearings it is, therefore, necessary
for the bearings to be a tight fit in the barrel, but
this fit must not be so tight as to close down the
outer race of the bearing, and thus overload the
balls. The following are the manufacturing
tolerances which control the fit of the bearings.
The figures for the bearings themselves are for
SKF bearings,
tolerances are similar.
Bearing o/d, 1.5622/1.5617 in.
Housing bore, 1.5620/1.5616 in.
Bearing bore, .6252/.6247 in.
Shaft diameter, .6252/.6248 in.
8. Refitting Ball Bearings
To refit the bearings in the hub, two hollow
drifts are required, as shown in Fig. 2. One
bearing is first fitted to one end of the spindle by
means of the hollow drift ; the spindle and
bearing are then entered into one end of the hub
barrel, which is then supported on one of the
hollow drifts. The other bearing is then threaded
over the upper end of the spindle and driven
home by means of the second hollow drift either
under a press, or by means of a hammer, which
will thus drive both bearings into position
simultaneously.
Section K5 Page 2
9
/ in. o/d by
16
5
/ in., Fischer LS7.
8
but other manufacturers'
In order to make quite sure that there is
clearance between the inner faces of the outer
7
bearing races and the bottom of the recesses, fit
/ in.
16
the distance washers, cover plate, dust excluder
and the nuts on the spindle. Tightening the nuts
should not have any effect on the ease with
which the spindle can be turned. If tightening
the nuts makes the spindle hard to turn this may
be taken as proof that the bearings are
bottoming in the recesses in the hub barrel
before they are solid against the shoulders on
the spindle. In this case, the bearing should be
removed and a thin packing shim fitted between
the inner race and the shoulder on the spindle.
9. Re-assembly of Brake Shoes and Operating
Cam into Cover Plate
No difficulty should be experienced in
carrying out these operations. Put a smear of
grease on the pivot pin and on the operating face
of the cam ; also on to the cylindrical bearing
surface of the operating cam. Fit the operating
lever on its splines in a position to suit the extent
of wear on the linings and secure with the nut
and washer. Note that the position of the
operating lever may have to be corrected when
adjusting the brake after refitting the wheel. The
range of adjustment can be extended by moving
this lever on to a different spline. Limit of wear
is reached when the cam is turned through nearly
90° with the brake hard on, so that there is a
danger that the operating springs cannot return
the brake to the off position.
10. Final Assembly of Hub before Replacing
Wheel
Before replacing the felt washers which form
the grease seals, pack all bearings with grease.
Recommended greases are Castrolease LM,
Mobilgrease MP, Esso Multipurpose Grease H,
Energrease L2, Shell Retinax A, or Marfak
Multipurpose 2. The use of H.M.P. greases
which have
recommended, as these tend to be slightly
corrosive if any damp finds its way into the
hubs.
Make sure that the inside of the brake drum is
quite free from oil or grease, damp, etc. Replace
the felt washers, distance collars, dust excluder
and brake cover plate and securely tighten the
spindle nuts.
11. Wheel Rim
The wheel rim is WM2-17 in., plunged and
pierced with forty holes for spoke nipples. The
spoke holes are symmetrical, i.e., the rim can be
assembled to the hub either way round. The rim
diameter after building is 17.062 in., the
a soda soap base is not